[INFO] cloning repository https://github.com/0xksure/leetcode
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/0xksure/leetcode" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0xksure%2Fleetcode", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0xksure%2Fleetcode'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 38bc6255abfee22b3ee532930d31756e30754258
[INFO] checking 0xksure/leetcode against try#84addd32a13fa2d3f62fe5d99031611147b7fb13 for pr-147565
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2F0xksure%2Fleetcode" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/0xksure/leetcode
[INFO] finished tweaking git repo https://github.com/0xksure/leetcode
[INFO] tweaked toml for git repo https://github.com/0xksure/leetcode written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/0xksure/leetcode on toolchain 84addd32a13fa2d3f62fe5d99031611147b7fb13
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+84addd32a13fa2d3f62fe5d99031611147b7fb13" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/0xksure/leetcode already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+84addd32a13fa2d3f62fe5d99031611147b7fb13" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+84addd32a13fa2d3f62fe5d99031611147b7fb13" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8f5e1be37951d074a96bde452c08f7de1600f3e13c3ffe287eb5da0b12ad986c
[INFO] running `Command { std: "docker" "start" "-a" "8f5e1be37951d074a96bde452c08f7de1600f3e13c3ffe287eb5da0b12ad986c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8f5e1be37951d074a96bde452c08f7de1600f3e13c3ffe287eb5da0b12ad986c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8f5e1be37951d074a96bde452c08f7de1600f3e13c3ffe287eb5da0b12ad986c", kill_on_drop: false }`
[INFO] [stdout] 8f5e1be37951d074a96bde452c08f7de1600f3e13c3ffe287eb5da0b12ad986c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+84addd32a13fa2d3f62fe5d99031611147b7fb13" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5c224a025af9c21fe6959b920ac77b97a2f0fea7fb71bedc07a62c9bd2283484
[INFO] running `Command { std: "docker" "start" "-a" "5c224a025af9c21fe6959b920ac77b97a2f0fea7fb71bedc07a62c9bd2283484", kill_on_drop: false }`
[INFO] [stderr]     Checking leetcode v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `core::num`
[INFO] [stdout]  --> src/study_plan/contains_duplicates.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::num;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::num`
[INFO] [stdout]  --> src/study_plan/find_numbers.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::num;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::num`
[INFO] [stdout]  --> src/study_plan/find_pivot_index.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::num;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Index`
[INFO] [stdout]  --> src/study_plan/get_min_swaps.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::Index;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]   --> src/study_plan/get_min_swaps.rs:16:22
[INFO] [stdout]    |
[INFO] [stdout] 16 |             char_vec[(i - 1)] = last;
[INFO] [stdout]    |                      ^     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 16 -             char_vec[(i - 1)] = last;
[INFO] [stdout] 16 +             char_vec[i - 1 ] = last;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Add`
[INFO] [stdout]  --> src/study_plan/is_happy.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::Add;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::vec`
[INFO] [stdout]  --> src/study_plan/is_isomorphic.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::vec;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]   --> src/study_plan/least_interval.rs:33:34
[INFO] [stdout]    |
[INFO] [stdout] 33 |             task_list.push(tasks[(tasks.len() - 1)]);
[INFO] [stdout]    |                                  ^               ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 33 -             task_list.push(tasks[(tasks.len() - 1)]);
[INFO] [stdout] 33 +             task_list.push(tasks[tasks.len() - 1]);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fmt::format`
[INFO] [stdout]  --> src/study_plan/multiply_strings.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::{fmt::format, ops::Mul};
[INFO] [stdout]   |           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::num`
[INFO] [stdout]  --> src/study_plan/contains_duplicates.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::num;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::num`
[INFO] [stdout]  --> src/study_plan/find_numbers.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::num;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `core::num`
[INFO] [stdout]  --> src/study_plan/find_pivot_index.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::num;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Index`
[INFO] [stdout]  --> src/study_plan/get_min_swaps.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::Index;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]   --> src/study_plan/get_min_swaps.rs:16:22
[INFO] [stdout]    |
[INFO] [stdout] 16 |             char_vec[(i - 1)] = last;
[INFO] [stdout]    |                      ^     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 16 -             char_vec[(i - 1)] = last;
[INFO] [stdout] 16 +             char_vec[i - 1 ] = last;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::ops::Add`
[INFO] [stdout]  --> src/study_plan/is_happy.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::Add;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::vec`
[INFO] [stdout]  --> src/study_plan/is_isomorphic.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::vec;
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around index expression
[INFO] [stdout]   --> src/study_plan/least_interval.rs:33:34
[INFO] [stdout]    |
[INFO] [stdout] 33 |             task_list.push(tasks[(tasks.len() - 1)]);
[INFO] [stdout]    |                                  ^               ^
[INFO] [stdout]    |
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 33 -             task_list.push(tasks[(tasks.len() - 1)]);
[INFO] [stdout] 33 +             task_list.push(tasks[tasks.len() - 1]);
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `fmt::format`
[INFO] [stdout]  --> src/study_plan/multiply_strings.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::{fmt::format, ops::Mul};
[INFO] [stdout]   |           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `i` is never read
[INFO] [stdout]  --> src/study_plan/find_ball.rs:7:21
[INFO] [stdout]   |
[INFO] [stdout] 7 |         let mut i = 0; // col counter
[INFO] [stdout]   |                     ^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `j` is never read
[INFO] [stdout]  --> src/study_plan/find_ball.rs:8:21
[INFO] [stdout]   |
[INFO] [stdout] 8 |         let mut j = 0; // row counter
[INFO] [stdout]   |                     ^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `i` is never read
[INFO] [stdout]  --> src/study_plan/find_ball.rs:7:21
[INFO] [stdout]   |
[INFO] [stdout] 7 |         let mut i = 0; // col counter
[INFO] [stdout]   |                     ^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `j` is never read
[INFO] [stdout]  --> src/study_plan/find_ball.rs:8:21
[INFO] [stdout]   |
[INFO] [stdout] 8 |         let mut j = 0; // row counter
[INFO] [stdout]   |                     ^
[INFO] [stdout]   |
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0384]: cannot assign twice to immutable variable `index`
[INFO] [stdout]   --> src/study_plan/infected_binary_tree.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 30 |         let index = 0;
[INFO] [stdout]    |             ----- first assignment to `index`
[INFO] [stdout] ...
[INFO] [stdout] 33 |             index += 1;
[INFO] [stdout]    |             ^^^^^^^^^^ cannot assign twice to immutable variable
[INFO] [stdout]    |
[INFO] [stdout] help: consider making this binding mutable
[INFO] [stdout]    |
[INFO] [stdout] 30 |         let mut index = 0;
[INFO] [stdout]    |             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0384]: cannot assign twice to immutable variable `index`
[INFO] [stdout]   --> src/study_plan/infected_binary_tree.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 30 |         let index = 0;
[INFO] [stdout]    |             ----- first assignment to `index`
[INFO] [stdout] ...
[INFO] [stdout] 33 |             index += 1;
[INFO] [stdout]    |             ^^^^^^^^^^ cannot assign twice to immutable variable
[INFO] [stdout]    |
[INFO] [stdout] help: consider making this binding mutable
[INFO] [stdout]    |
[INFO] [stdout] 30 |         let mut index = 0;
[INFO] [stdout]    |             +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0381]: used binding `start_root` is possibly-uninitialized
[INFO] [stdout]   --> src/study_plan/infected_binary_tree.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let mut start_root;
[INFO] [stdout]    |             -------------- binding declared here but left uninitialized
[INFO] [stdout] ...
[INFO] [stdout] 32 |             start_root = root.as_ref().unwrap().borrow().right.clone();
[INFO] [stdout]    |             ---------- binding initialized here in some conditions
[INFO] [stdout] ...
[INFO] [stdout] 40 |         if start_root.as_ref().unwrap().borrow().val == start {}
[INFO] [stdout]    |            ^^^^^^^^^^ `start_root` used here but it is possibly-uninitialized
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `uninfected`
[INFO] [stdout]   --> src/study_plan/infected_binary_tree.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |         let uninfected = true;
[INFO] [stdout]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_uninfected`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `index` is assigned to, but never used
[INFO] [stdout]   --> src/study_plan/infected_binary_tree.rs:30:13
[INFO] [stdout]    |
[INFO] [stdout] 30 |         let index = 0;
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_index` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `index` is never read
[INFO] [stdout]   --> src/study_plan/infected_binary_tree.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |             index += 1;
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/study_plan/is_isomorphic.rs:24:26
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn is_isomorphic(s: String, t: String) -> bool {
[INFO] [stdout]    |                          ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/study_plan/is_isomorphic.rs:24:37
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn is_isomorphic(s: String, t: String) -> bool {
[INFO] [stdout]    |                                     ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0381]: used binding `start_root` is possibly-uninitialized
[INFO] [stdout]   --> src/study_plan/infected_binary_tree.rs:40:12
[INFO] [stdout]    |
[INFO] [stdout] 28 |         let mut start_root;
[INFO] [stdout]    |             -------------- binding declared here but left uninitialized
[INFO] [stdout] ...
[INFO] [stdout] 32 |             start_root = root.as_ref().unwrap().borrow().right.clone();
[INFO] [stdout]    |             ---------- binding initialized here in some conditions
[INFO] [stdout] ...
[INFO] [stdout] 40 |         if start_root.as_ref().unwrap().borrow().val == start {}
[INFO] [stdout]    |            ^^^^^^^^^^ `start_root` used here but it is possibly-uninitialized
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `uninfected`
[INFO] [stdout]   --> src/study_plan/infected_binary_tree.rs:27:13
[INFO] [stdout]    |
[INFO] [stdout] 27 |         let uninfected = true;
[INFO] [stdout]    |             ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_uninfected`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `index` is assigned to, but never used
[INFO] [stdout]   --> src/study_plan/infected_binary_tree.rs:30:13
[INFO] [stdout]    |
[INFO] [stdout] 30 |         let index = 0;
[INFO] [stdout]    |             ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: consider using `_index` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `index` is never read
[INFO] [stdout]   --> src/study_plan/infected_binary_tree.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |             index += 1;
[INFO] [stdout]    |             ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/study_plan/is_isomorphic.rs:24:26
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn is_isomorphic(s: String, t: String) -> bool {
[INFO] [stdout]    |                          ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/study_plan/is_isomorphic.rs:24:37
[INFO] [stdout]    |
[INFO] [stdout] 24 |     pub fn is_isomorphic(s: String, t: String) -> bool {
[INFO] [stdout]    |                                     ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/study_plan/map_sum.rs:33:26
[INFO] [stdout]    |
[INFO] [stdout] 33 |             .filter(|(k, v)| k.starts_with(&prefix))
[INFO] [stdout]    |                          ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/study_plan/map_sum.rs:33:26
[INFO] [stdout]    |
[INFO] [stdout] 33 |             .filter(|(k, v)| k.starts_with(&prefix))
[INFO] [stdout]    |                          ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/study_plan/odd_even_linked_list.rs:25:26
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn odd_even_list(mut head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stdout]    |                          ----^^^^
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/study_plan/odd_even_linked_list.rs:25:26
[INFO] [stdout]    |
[INFO] [stdout] 25 |     pub fn odd_even_list(mut head: Option<Box<ListNode>>) -> Option<Box<ListNode>> {
[INFO] [stdout]    |                          ----^^^^
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `game_vec`
[INFO] [stdout]  --> src/study_plan/solitare.rs:6:13
[INFO] [stdout]   |
[INFO] [stdout] 6 |         let game_vec = [a, b, c].to_vec();
[INFO] [stdout]   |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_game_vec`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `game_vec`
[INFO] [stdout]  --> src/study_plan/solitare.rs:6:13
[INFO] [stdout]   |
[INFO] [stdout] 6 |         let game_vec = [a, b, c].to_vec();
[INFO] [stdout]   |             ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_game_vec`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0381, E0384.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0381`.
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0381, E0384.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0381`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `leetcode` (bin "leetcode") due to 2 previous errors; 19 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `leetcode` (bin "leetcode" test) due to 2 previous errors; 19 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "5c224a025af9c21fe6959b920ac77b97a2f0fea7fb71bedc07a62c9bd2283484", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c224a025af9c21fe6959b920ac77b97a2f0fea7fb71bedc07a62c9bd2283484", kill_on_drop: false }`
[INFO] [stdout] 5c224a025af9c21fe6959b920ac77b97a2f0fea7fb71bedc07a62c9bd2283484
